Cadillac STS Forum - 2005 through 2012 Discussion, Looking to purchase a 05-08 sts, motor questions? in Past Cadillac Vehicle Discussion; I have my eye on a few cars right now, I'm having a hard time deciding between the v6 and ...

Re: Looking to purchase a 05-08 sts, motor questions?

I've got an 06 STS with the v6 with 75,000 miles and am doing an oil useage test through my dealer to see if GM will relace/rebuild the engine. I'm using 1 quart every 700 miles!! I buy Mobil1 by the gallon to keep my STS and my wife's SRX filled. Hers has the same problem but we haven't done the test yet. I'd agree with the posts on the v8, although I've never driven one. I get 20-21 mpg most of the time and have never gotten above 22.

Re: Looking to purchase a 05-08 sts, motor questions?

Originally Posted by chachd

I've got an 06 STS with the v6 with 75,000 miles and am doing an oil useage test through my dealer to see if GM will relace/rebuild the engine. I'm using 1 quart every 700 miles!! I buy Mobil1 by the gallon to keep my STS and my wife's SRX filled. Hers has the same problem but we haven't done the test yet. I'd agree with the posts on the v8, although I've never driven one. I get 20-21 mpg most of the time and have never gotten above 22.

Hello chachd,

I see you have an ongoing issue with your oil usage. If this is something you would like me to assist you with, please private message me with your name, address, phone number, and VIN#. I am more than happy to be of assistance and stay involved through your process of fixing this issue. Have a wonderful night!